refactor widget api design

this passes all widget API calls through the backend, with a pluggable design and reusable API handlers

src/utils/proxies/rutorrent.js

@@ -0,0 +1,30 @@
+import RuTorrent from "rutorrent-promise";
+
+import { getServiceWidget } from "utils/service-helpers";
+
+export default async function rutorrentProxyHandler(req, res) {
+  const { group, service } = req.query;
+
+  if (group && service) {
+    const widget = await getServiceWidget(group, service);
+
+    if (widget) {
+      const constructedUrl = new URL(widget.url);
+
+      const rutorrent = new RuTorrent({
+        host: constructedUrl.hostname,
+        port: constructedUrl.port,
+        path: constructedUrl.pathname,
+        ssl: constructedUrl.protocol === "https:",
+        username: widget.username,
+        password: widget.password,
+      });
+
+      const data = await rutorrent.get(["d.get_down_rate", "d.get_up_rate", "d.get_state"]);
+
+      return res.status(200).send(data);
+    }
+  }
+
+  return res.status(400).json({ error: "Invalid proxy service type" });
+}